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San Juan County (Oljato-Monument Valley)
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United States weather

Weather in San Juan County, Utah for May 2026

Your guide to San Juan County weather in May - trends and predictions

    Temperatures

  • So far, May 2026 in San Juan County is slightly warmer than the historical average by 0.6 °F.

  • The forecast for the coming days of May 2026 predicts a temperature of 27.7 °F , which is warmer than usual.

  • In general, the average temperature in San Juan County at the beginning of May is 18.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 26.9 °F by the end of May.

    • Rain 🌧️

  • San Juan County experiences moderate rainfall in May, with an average of 6 rainy days and a total precipitation of 14 mm.

    • More

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Average dry days
25
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/8°
Temperatures
Average wind speed
25 km/h
Avg max wind
Average humidity
36 %
Avg humidity

San Juan County Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
17°
2
Overcast
20°
3
Overcast
22°
4
Moderate or heavy rain shower
19°
5
Heavy rain at times
14°
6
Overcast
16°
7
Patchy rain possible
19°
8
Sunny
24°
9
Sunny
25°
10
Sunny
28°
11
Sunny
29°
12
Sunny
32°
13
Patchy rain possible
30°
14
Sunny
29°
15
Sunny
25°
16
Sunny
27°
17
Sunny
30°
18
Sunny
31°
19
Sunny
30°
20
Sunny
28°
21
Partly cloudy
25°
22
Sunny
26°
23
Partly cloudy
18°
24
Overcast
25°
25
Sunny
25°
26
Partly cloudy
25°
27
Overcast
26°
28
Overcast
27°
29
Overcast
26°
30
Partly cloudy
29°
31
Sunny
30°

Temperatures trend during May in San Juan County

See the weather trend as well as the moving average line

May weather in San Juan County day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
May 1 Patchy rain possible
Patchy rain possible
 17° /7° 0.5 mm 8
May 2 Overcast
Overcast
 20° /7° 0 mm 8
May 3 Overcast
Overcast
 22° /6° 0.1 mm 8
May 4 Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /8° 3.2 mm 7
May 5 Heavy rain at times
Heavy rain at times
 14° /6° 1.2 mm 8
May 6 Overcast
Overcast
 16° /5° 0.1 mm 8
May 7 Patchy rain possible
Patchy rain possible
 19° /6° 0.9 mm 8
May 8 Sunny
Sunny
 24° /8° 0 mm 9
May 9 Sunny
Sunny
 25° /12° 0 mm 9
May 10 Sunny
Sunny
 28° /12° 0 mm 9.9
May 11 Sunny
Sunny
 29° /14° 0 mm 10.1
May 12 Sunny
Sunny
 32° /18° 0 mm 0
May 13 Patchy rain possible
Patchy rain possible
 30° /20° 0.2 mm 5
May 14 Sunny
Sunny
 29° /16° 0 mm 6
May 15 Sunny
Sunny
 25° /14° 0 mm 6
May 16 Sunny
Sunny
 27° /13° 0 mm 6
May 17 Sunny
Sunny
 30° /14° 0 mm 6
May 18 Sunny
Sunny
 31° /17° 0 mm 6
May 19 Sunny
Sunny
 30° /17° 0 mm 6
May 20 Sunny
Sunny
 28° /18° 0 mm 6
May 21 Partly cloudy
Partly cloudy
 25° /16° 0 mm 6
May 22 Sunny
Sunny
 26° /15° 0 mm 6
May 23 Partly cloudy
Partly cloudy
 18° /11° 0 mm 4
May 24 Overcast
Overcast
 25° /11° 0 mm 6
May 25 Sunny
Sunny
 25° /8° 0 mm 7
May 26 Partly cloudy
Partly cloudy
 25° /8° 0 mm 7
May 27 Overcast
Overcast
 26° /10° 0 mm 6
May 28 Overcast
Overcast
 27° /12° 0 mm 6
May 29 Overcast
Overcast
 26° /13° 0 mm 6
May 30 Partly cloudy
Partly cloudy
 29° /13° 0 mm 7
May 31 Sunny
Sunny
 30° /14° 0 mm 8
Next
Important Notice
Our weather forecast for San Juan County in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Juan County forecast closer to your planned date for the most up-to-date weather information.
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San Juan County in May - FAQ

What are the expected maximum and minimum temperatures in San Juan County during May?

Enjoy moderate daytime temperatures of up to 23° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in San Juan County during May?

Expect minimal rainfall in San Juan County during May, with a total of 14 mm over approximately 6 days. This minimal precipitation is unlikely to significantly impact plans.

What are the typical wind conditions in San Juan County during May?

The average wind speed in San Juan County during May is 25 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in San Juan County

Explore the daily rainfall trends and prepare for San Juan Countys May weather 💧
Typically, San Juan County has 6 rainy days in May with a total of 14 mm of rainfall.

UV exposure in San Juan County during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Top locations in San Juan County
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Oljato-Monument ValleySilverton
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Location coordinates Where is San Juan County?

Get accurate weather forecasts for San Juan County, located at latitude 37.031 and longitude -110.251. Stay updated with localized weather information tailored for San Juan County.

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